Add MVP features: edit mode, voice input, Gitea push, service autocomplete

- new.tsx: edit mode via editId param, per-field voice dictation (MIC/STOP),
  service autocomplete dropdown from DB history
- incident/[id].tsx: Push to Gitea action reads SecureStore config + md template
- index.tsx: homeView=capture redirects to /new on first mount
- _layout.tsx: onboarding gate wired (useSettings + router.replace)
- ci: GitHub Actions workflow builds debug APK via expo prebuild + Gradle

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/_layout.tsx

@@ -1,10 +1,21 @@
-import { Stack } from "expo-router";
+import { useEffect } from "react";
+import { Stack, router } from "expo-router";
 import { StatusBar } from "expo-status-bar";
 import { GestureHandlerRootView } from "react-native-gesture-handler";
 import "../global.css";
 import { Colors } from "@/constants/theme";
+import { useSettings } from "@/hooks/useSettings";
 
 export default function RootLayout() {
+  const { settings, ready } = useSettings();
+
+  useEffect(() => {
+    if (!ready) return;
+    if (!settings.onboardingDone) {
+      router.replace("/onboarding");
+    }
+  }, [ready, settings.onboardingDone]);
+
   return (
     <GestureHandlerRootView style={{ flex: 1, backgroundColor: Colors.bg }}>
       <StatusBar style="light" />